Display screen or portion thereof with transitional graphical user interface



FIG. 1 is a front view of a first image in a sequence according to afirst embodiment of our design for a display screen or portion thereofwith transitional graphical user interface;

FIG. 2 is a front view of a second image in the sequence thereof;

FIG. 3 is a front view of a third image in the sequence thereof;

FIG. 4 is a front view of a first image in a sequence according to asecond embodiment of our design for a display screen or portion thereofwith transitional graphical user interface;

FIG. 5 is a front view of a second image in the sequence thereof; and,

FIG. 6 is a front view of a third image in the sequence thereof.

The appearance of the transitional image transitions between the imagesshown in FIGS. 1 through 3 and between the images shown in FIGS. 4through 6, respectively. The process or period in which one imagetransitions to another forms no part of the claimed design.

The shading illustrates a contrast in appearance. The shading appearsaround the illustrated row or rows of cards.

The outermost rounded rectangles in broken lines showing an electronicdevice illustrate environmental subject matter. The broken line showinga display screen, the closely spaced broken lines showing text, and allother broken lines showing portions of the graphical user interfaceillustrate portions of the article. None of the aforementioned brokenline subject matter forms part of the claimed design.

CLAIM The ornamental design for a display screen or portion thereof withtransitional graphical user interface, as shown and described.